Investigation on temperature field of surrounding tooth domain with cracked tooth in gear system

In order to study the temperature field of the gear transmission system with cracks, the stiffness load ratio of the cracked tooth and the surrounding tooth is derived. The temperature field of the surrounding tooth domain of cracked tooth is predicted by coalescent with the formula of stiffness load ratio and BLOK flash temperature theory. The influence law of the crack depth on the temperature field of the crack tooth and the surrounding tooth domain is revealed. The results of the theoretical analysis and the prediction of the temperature field are verified. In the analysis on the result of the finite element experiment, the tooth root's instantaneous fracture size of the gear system is found. By means of finite element simulation, various load tests were carried out for the gear system with cracked teeth, and then the change rule in the temperature field of the surrounding tooth domain of cracked teeth under different load conditions was found. Finally, the validity of the finite element method is verified by experiments.